Lg Electronics Inc.

Snur & Db Foundation

Seoul National University

Jongwoo Hong

Youngdae Lee

Jaewook Lee

Giwon Park

Seoyoung Back

Seungmin Lee

Taehun Kim

Sunghoon Jung

Hanbyul Seo

Oanyong Lee

Hakseong Kim

Sunghyun Choi

Seungjune Yi

Hyukjin Chae

Sunyoung Lee

Daewook Byun

Woosuk Ko

Laeyoung Kim

Sangwon Kim

Jian Xu

Seokjung Kim

Hongsuk Kim

Hyunjung Choe

Kyungsoo Kim

Kwangbok Lee

Seonik Seong

Daesung Hwang

Genebeck Hahn

Youngtae Kim

Myoungseob Kim

Geumsan Jo

Bokyung Byun

Hanul Lee

HoYoung Yoon

A method and apparatus for master cell group (MCG) radio link failure (RLF) reporting during secondary cell group (SCG) suspension in a wireless communication system is provided. A wireless device detects a failure on a master cell group (MCG) while a secondary cell group (SCG) is suspended, and transmits MCG failure information informing the failure on the MCG by using a physical uplink control channel (PUCCH) format via the SCG, based on unavailability of physical uplink shared channel (PUSCH) transmission via the SCG.

Radio link failure reporting for master cell group during secondary cell group suspension

The present disclosure relates to a failure recovery in wireless communications. According to an embodiment of the present disclosure, a method performed by a wireless device served by a master node (MN) and a secondary node (SN) in a dual connectivity (DC) in a wireless communication system comprises: receiving information for a timer related to a fast master cell group (MCG) recovery and a conditional mobility attempt configuration; starting the timer related to the fast MCG recovery upon detecting a MCG failure; and based on detecting an expiry of the timer related to the fast MCG recovery: removing one or more conditional mobility commands stored in the wireless device; and initiating a transmission of a radio resource control (RRC) re-establishment request message.

Method and apparatus for failure recovery in wireless communication system

The present disclosure relates to a reconfiguration in a wireless communication system. According to various embodiments, a method performed by a master node (MN) serving a wireless device with a source secondary node (SN) in a dual connectivity (DC) in a wireless communication system comprises: transmitting, to the wireless device, radio resource control (RRC) reconfiguration parameters; transmitting, to the source SN, a request message for a user equipment (UE) context stored in the source SN; receiving, from the source SN, a response message comprising the UE context; transmitting, to a target SN, a SN addition request message comprising the UE context; receiving, from the target SN, a SN addition request acknowledgement message comprising a delta configuration for the RRC reconfiguration parameters, wherein the delta configuration comprises a configuration that is changed with respect to the RRC reconfiguration parameters in the UE context; and transmitting, to the wireless device, a RRC reconfiguration message for SN mobility comprising the delta configuration.

Method and apparatus for reconfiguration in wireless communication system

A method and apparatus for Sidelink (SL) Discontinuous Reception (DRX) operation based on multiple DRX configurations and prioritization is provided. A third wireless device receives, from a first wireless device, first Sidelink (SL) Discontinuous Reception (DRX) information, and receives, from a second wireless device, second SL DRX information. The third wireless device informs a network about the first and second SL DRX information, each of which is constructed for each pair of source and destination.

Sidelink DRX operation based on multiple DRX configurations and prioritization

A method and apparatus for suspending measurement with measurement configuration in a wireless communication system is provided. A wireless device receives, from a first cell, measurement configuration including a measurement frequency list and a suspension cell list. A wireless device perform measurements on at least one frequency included in the measurement frequency list. A wireless device moves to a second cell from the first cell. A wireless device stops the measurements and keeps the measurement configuration, based on determining that the second cell is included in the suspension cell list.

Method and apparatus for suspending measurement with measurement configuration in a wireless communication system

The present disclosure relates to inactivity handling in mobility in wireless communication system. According to various embodiments, a method performed by a master node (MN) serving a wireless device with a secondary node (SN) in a wireless communication system comprises: receiving, from the SN, criterion information for triggering a primary secondary cell (PSCell) mobility; transmitting, to the wireless device, a configuration for the PSCell mobility comprising the criterion information; receiving, from the wireless device, state indication information informing that the wireless device is in an inactive state after the PSCell mobility is completed based on the configuration; and transmitting, to the SN, the state indication information received from the wireless device.

Method and apparatus for inactivity handling in mobility in wireless communication system

The present disclosure relates to mobility in dual connectivity (DC) in wireless communications. According to an embodiment of the present disclosure, a method performed by a wireless device in a wireless communication system comprises: receiving, from a network, a plurality of conditional mobility commands, each of the plurality of conditional mobility commands comprising a respective trigger type; identifying, among the plurality of conditional mobility commands, one or more conditional mobility commands comprising a trigger type corresponding to a secondary cell group (SCG) configuration status of the wireless device; and performing an evaluation of one or more target cells related to the one or more conditional mobility commands.

Method and apparatus for mobility in dual connectivity in wireless communication system

Proposed is an operation method of a first device () in a wireless communication system. The method may comprise the steps of: receiving sidelink (SL) data related to a first SL service from a second device () at a first time point within an active time of a second SL discontinuous reception (DRX) configuration related to a second SL service; and starting a first timer of a first SL DRX configuration related to the first SL service on the basis of reception of the SL data.

Method and device for solving packet loss due to misalignment of DRX on-duration in NR V2X

An operation method related to sidelink of a second user equipment (UE) in a wireless communication system includes transmitting, by the second UE, assistance information including a plurality of first discontinuous reception (DRX) configuration related information to a first UE, wherein the plurality of first DRX configuration related information is transmitted to a base station (BS) by the first UE, and receiving, by the second UE, one or more second DRX configuration related information transmitted by the BS. The second DRX configuration related information is determined based on the assistance information including the plurality of first DRX configuration related information.

Method of operating a UE related to sidelink DRX in a wireless communication system

Provided are a method for performing wireless communication by a first device, and an apparatus for supporting same. The method may comprise: obtaining a sidelink (SL) discontinuous reception (DRX) configuration including information related to a timer for an active time and information related to a hybrid automatic repeat request (HARQ) round trip time (RTT) timer; starting the timer for the active time; receiving, from a second device through a physical sidelink control channel (PSCCH) based on a first SL resource, a first sidelink control information (SCI) for scheduling of a physical sidelink shared channel (PSSCH) and a second SCI; and receiving, from the second device through the PSSCH based on the first SL resource, the second SCI and data. Herein, based on resource allocation information for a second SL resource being included in the first SCI, the first device may not monitor retransmission of the data from the second device in a time domain between the first SL resource and the second SL resource, and based on the resource allocation information for the second SL resource not being included in the first SCI, the HARQ RTT timer included in the SL DRX configuration may be started by the first device.

Method and apparatus for performing DRX operation based on resource allocation information in NR V2X

Provided are a method for performing wireless communication by a first device, and an apparatus for supporting same. The method may comprise: starting a timer for an active time; receiving, from a second device through a physical sidelink control channel (PSCCH) based on a first sidelink (SL) resource, a first sidelink control information (SCI) including information related to a time domain of a second SL resource and information related to a frequency domain of the second SL resource; receiving, from the second device through a physical sidelink shared channel (PSSCH) related to the PSCCH based on the first SL resource, a second SCI and data; determining a value of a SL discontinuous reception (DRX) hybrid automatic repeat request (HARQ) round trip time (RTT) timer, based on a time interval between the first SL resource and the second SL resource; and starting the SL DRX HARQ RTT timer.

A method and apparatus for controlling relaxed measurement in a wireless communication system is provided. A wireless device receives, from a network, a first measurement configuration including at least one of relaxed measurement conditions. A wireless device receives, from the network, a second measurement configuration including a frequency set to be measured in an idle state and/or an inactive state. A wireless device determines to perform a relaxed measurement or no measurement on at least one of frequency which is not included in the frequency set included in the second measurement configuration, based on that the at least one of the relaxed measurement conditions is met.

Method and apparatus for controlling relaxed measurement in a wireless communication system

A method and apparatus for multiple carrier transmissions for recovery of sidelink connection in a wireless communication system is provided. A first wireless device determines whether to recover a sidelink connection on which a failure occurs based on a characteristic of the sidelink connection, and transmits, to a second wireless device, a message related to a recovery of the sidelink connection based on a determination to recover the sidelink connection.

Multiple carrier transmissions for recovery of sidelink connection

A method and apparatus for recovery from deadlock after master cell group (MCG) failure report in a wireless communication system is provided. Upon detecting a master cell group (MCG) radio link failure (RLF), a wireless device transmits information for the MCG RLF to a secondary node (SN) by using a secondary cell group (SCG), and starts a timer. Upon expiry of the timer, the wireless device performs a connection re-establishment procedure.

Recovery from deadlock after MCG failure report

One embodiment relates to a method for sidelink related operation of a receiving (RX) user equipment (UE) in a wireless communication system, the method comprising the steps in which: the RX UE receives first SCI from a transmitting UE (TX UE) through a physical sidelink control channel (PSCCH); and the RX UE receives a physical sidelink shared channel (PSSCH) and second SCI from the TX UE on the basis of the first SCI, wherein the second SCI includes information about activating physical sidelink feedback channel (PSFCH) transmission related to the PSSCH, and whether to start a retransmission timer on the basis of the PSFCH transmission being dropped is determined on the basis of whether the dropped PSFCH transmission is related to either NACK or ACK.

Growing community of inventors

Seoul, South Korea

Jongwoo Hong